Home / 815,745.76-1,223,649.39-310,212.51

Finding the Fourth Proportional to 815,745.76, 1,223,649.39 and 310,212.51

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Solution

The fourth proportional to 815,745.76, 1,223,649.39 and 310,212.51 is: 465,330.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,745.76 : 1,223,649.39 = 310,212.51 : x
  2. Step 2: Convert to fraction form
    815,745.76/1,223,649.39 = 310,212.51/x
  3. Step 3: Cross multiply
    815,745.76x = 1,223,649.39 × 310,212.51
  4. Step 4: Simplify right side
    815,745.76x = 379,591,348,631.87
  5. Step 5: Solve for x
    x = 379,591,348,631.87/815,745.76
  6. Step 6: Final answer
    x = 465,330.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.